Electrical dental machine



my z2 1 924. 1,502,435

N. E. MORGAN ELECTRICAL DENTAL MACHINE u Filed D80. 8, 1920 3Sheets-Sheet Vl i 47 "lim Z5 .5 t

6 I l n 7j':. m A6, "`676 54 .57 55 60, 73

5 www@ Suva/Lto?,

@Hozumrg July 22, 1924. 1,502,4`3

N. E. MORGAN ELECTRICAL DENTAL MACHINE Filed DSO. B, 1920 v3SheetSwSheat 2 ...mlmlll 51, aawu/ my 2z 1924. 1,502,435

N. E. MORGAN 'ELECTRICAL DENTAL MACHINE Filed Deo. a, 192C ssheets-sheen S wueuinr l'P atented July i 22,11924.

`wherein l the `molding of crowns, land thel like `is carried out throug`fmeajns'ofl NUMA `unvrn "Momma, or ATLANTA-encadrer Y 'ELECTRICALDENTAL Millennia applicati@ ^mea December 11920. semina faenza'.

,To allfwhom ifv may concern.

Be itknown that I, ANUMA E. fMoRGAN,

citizen of the United States,resi`din `at lAtlanta, inthe county of*Fultony and; tatejof Georgia, have invented certain new and usefulImprovements in Electrical rDental'Machines; andI do hereby declare ytheifollowing to be afull, clear, and exact description of theinvention,-such as 4will-enable others skilled intheV art to which itappertains to *make and'usethe same. y p

This .invention yrelates 'to new :and useful improvements' 1n electricaldental machines and more particularly to a device which is applicable toan electric motor, suchas ,the standard upright motor and wherein theseveral parts of the'apparatus are lreadily f attachable or detachabletothe motor. The f main objectr of the present invention is theprovision of an `electrical dental :appliance late-'iWork centrifugalforce.

Another object of the. present invention is the provision of-` anelectrical" dental ap- A. includes the provisionofian l electric motorwherein various operations in the'dental Jartcan be carried outfthroughpower .derived from the" motor, the l several paratus which operatingparts beingv connected to' the drive shaft of the motor and arranged sothat while some of the parts are in operation, the

vother parts willy remain idle.

vAnother object of the presentl inventionis the provision of anelectrical dental apparatus yincluding amotor having a table mountedvupongthe shaft of themotor and detachably connected thereto, said.table carrying a plurality of electric heaters .for the purpose .ofmelting metal, said heaters be# lng Aprovidedfwith suitable heatingmeans whereby the heaters can be heated yduring the rotation of thetable and the'heatersbeving provided with molds attached thereto forreceiving the molten metal which vwill conform to theshape of the moldthroughl the 'centrifugal force upon the rotation of the table.

A further object of `the present invention is the provision of an`electrical kdental apparatus Whereinmeans is included -tor heatingprovided for `operating af'dental latheor instruments of the likecharacter.

,A furthervobject of the present invention f and illustratedfincross-section,

fremoved,

metal and molding the same through. centrifugal force and Aadditional*means 1s is the provision Aof aa dental T,rapp:trat-us y2in-`Acluding@'anfelectric'rimotor'; having -Aasrotatable the shaft, anda'ifurtherprovisionfomeans setV forth, pointed vout in vfthe/clairns and.shown lin the accompanying drawings, `in

which"..,l m

Figure `1is av side;elevation-Tofgaqmotorfilthereto, partsj thereofwbeingvbroken away Figure "2 is av topplanlview 1Vwith?r table ing' theelectrical: connectionsf'toithe, heaters and one of' the heaters and'molds i as welle-as the central portion "of the I-tablexbeing cut .awayand' illustrated'n cross-section. f Figure 4 is a` detailperspective-viefw-,ilf A lustrating the gas Iheater whiclicanlfbej-.used 'in place:of-theffelectriciheaten Figure 4 5V is a gplan` ,viewflfof *the meanswhich supportsthe electrical vbrushes, parts of the same-being brokenaway, V

Figure' 'Gis f a llongitudinal@sectionalivieri', I

through one of the vheaters;an'dfrnolds,

Figure. 7 is .a ,fronty elevation zofthefsame, Figure 8k is asideselevation of the `:mold and heater. Figure 9 is atop *plan .ofamodiliedfform of onn'ection between'the mold-andl crucible, an

line 114-11 of-Figure-9. Y

"FigurepIl-is alongitudinalsectionalfview taken Athrough an`:improved'ffform tof 'smo' i crucibleand heating means.

Fig. .'12 is a"horizontalsectional fviewiof the vCrucible illustratedinfFig. 11

.' Fig, 13 isanend elevation ,oithefcruciblei invention, L desire toCarrying outnmy n employ Van upright :motor "as i'llustratedfrin Figure,1, .but iti-1s to kloe understood that the several operating 'parts Ycan arbe [ja plied equally motor. shaft 2 and'is controlledthrou'ghvthezmeans of an. electric circuit 3, :having a; switch Figure,10 is a transverse sectiony of @the as Well to;y any fastandardcma ef ofThis motor 1 is :provided fwvith-y :a

for heating rmetalldepositedcwithin s; suitable receptaclesjcarrieilzl-by;.;thetable.V

. Vlfithv thevk above'fand: other. :objects -in-i-vi'ew; Athe inventionfconsistsvin'thez novellfeatures of construction,th'e'icombination'fandnearrangement of `i-'parte `"hereinalfterfmorefully flustrating lrnyfimprovedapparatusattached i 'i memberittocontrol the current to the i securedto lthe body of the motor to thussupport .the annulus 5in spaced relation wit the motor upon the shaft.Mounted I l upon the; shaft above the annulus is a hexagonal nut 7 andenclosing the upper. end of the-shaft 2 is a sleeve 8', which 1sarranged above the nut .7 and secured into position by means of thethumb nut 9, havin a threaded f "4' stem 10 adapted toA be en agevwithin the upperv end of the shaft w erebyto retain.'

the sleeve'8. in its respective position uponv theupper end of the s aft2. i Y

l Formed .integral with the sleeve' 8 is a table member 11, which can beeither rotated with the shaft or remain idle while the Ishaft is movingand in order to accoml'plish this resultfa suitable clutch mechanism'isprovidedf which includes the U-shaped member 12,- having an inwardlyprojecting .lug;13 formed upon its central portion and adapted toproject through an opening in lthesleeve 8-and engage within a recessformedin theshaft 2, whereby to connect the sleeve 8 with the shaft whenso desired.

aw-ithf. an arcuate slot 16, one end of which Theouter ends of the armsof the member 12 are connected by means of a plate 14 having a handle 15and further provided extends .into the'plate opposite the handle f. asuitable distance beyond the other end of f the slot-and engaged withinthis slot is a pin 17 adapted to be disposed in either end v.of the`slot so that the projection 13 may be either engaged ordisengaged withthe shaft -2 In order to assure the definite engagement of theprojection 13 with the recess in the shaft 2, suitable coil springs 18are rovided which are mounted within the casings 19 at opposite sides ofthe shaft 2 and adapted to encircle the side portions of the Amember 12.Secured to the side portions of the member 12 .are the plates 20, whichare adapted to bear against the ends of the coil springs 18, the tensionof said springs forcing the projection 13 into the recess of the shaft2, wherebyy to suitablyy connect the sleeve 8 with the shaft and whenthis is Y, done, the pin 17 will be in the farther end of the slot 16.When it is desired to disengage the projection 13 from the recess in theshaft 2, thehandle 15 is grasped. and the member 12 moved longitudinallyto disengage the pin -17 from the lower end of the slot 16 to theshorter end, whereby the projection 13 will be retained from engagementwith the recess in the shaft 2.

In Figure 3, I have illustrated the manner of applying the heaters orcrucibles to the plate 11. It will be noted in the present illustration,that they are disposed at diametrically opposite points upon the plateand securely attached thereto by means of the brackets 21. The cruciblesare further retained in position by having their outer ends engaged bythe annular flange 22 formed upon the plate 11 and their inner endsengaged with the upstanding plates or lugs 23, carried by the plate11.'y 'Each of the'crucibles constitute a body member 24 havin a cavity25 formed therein for the reception of the metal or other material to bemelted and extends outwardly from one end of the body into' acontracted'neck portion 26 communicating with the orifice 27 in the mold28. From this', it will be apparent 4that' after the metal `has been meted within the cavity 25, the plate 11 is rotated, the centrifugalmovement throwing the molten metal from the cavity 25 through thecontracted neck portion 26, into the mold orifice 27, where it willconform to the shape of the cavity within the mold.

. The mold is provided with a hinged cover portion k29 -having a centralopening 30- forming communication with the cavit `which 1s normallyclosed by means o .the cover plate 31. .j

The molds 28 are connected to the crucibles 24 by having their innerends thereof provided with an annular recess 32, ada ted to receive thereduced end portion 33 o the crucibles and these lmolds are Securelyretained in position with respectl to the crucibles by means of the hookmembers 34 disposed upon opposite sides ofthe Crucible and pivotallysecured thereto by means of the pins 35, the outer ends of the saidhooks being engaged with suitable eyelets 36 tov i retain the molds intheir operative positions, as clearly illustrated in Figures 1 and 3.

The crucibles 24 are provided within their bottom portions with suitablecavities 37 in which the heating coils 38 are arranged to heat the metalcontained within the cavities 25. These coils are suitably connected -bymeans ofthe vwires 39 tol the annular plate 40 which is mounted upon thetable 11, one ofv said wires being connected to the plate 40 through themedium of the knife switch 41, whereby the electrical current from thecoils 38 can be readily cut off when desired. The plate 40 is connectedto the plates 42 and 43 by means of suitable connecting wires, saidplates being arranged on the under side of the table 11 directly beneaththe plate 40 and the connections between the plates 42 and 43 and theplate 4() are insulated from the metallic plate by means of suitableinsulating plugs 44, arranged with openings provided therefor in thetable -11 and adapted to entirely enclose the connections between theplates. l

Mounted upon the hexagonal nut 7 is an annulus 45having oppositelydisposed arms 46 rcarried thereby, the outerv ends of said arms beingprovided with sockets 47 in which the brushes 48 are mounted, saidbrushes being connected to the source of supply through the wires 49,one' of said wires leading through the 'switch 4, which will controltheIrotation of thev table 11.

From this, it will be apparent lthat when the` vcircuit is closed bymeans of the switch 50, a

source of electrical supply will bevcommuni catedto the brushes 47,which in turn .will

supply a current of electricity to the heating coils 38 through themedium of the wires 39.

. Should it be found desirable to use as a heating medium inv place ofelectricity,

I provide suitable means for supplying thev gas for heatin the metalwithin thecavities 25 of the cruci les and to this end the means withineach, of the pipes 52 and extends up?" wardlyandprojects from the pipeat a point below the regulating valve 55. 'This air tube extends aroundthe valve 55 and then enters the pipe again and terminates at a pointremoved from `the end of the burner to 'supply a suitable quantity'ofair to be mixed with the gas from the pipes 5,2. The supply of air iscontrolled by means of a valve lmember 56 arranged within each one ofthe tubes54. Frorn this, it Awill be apparent that by connecting thering y51 with' av suitable source of supply of gas and air,

f sufficient heat can be produced to melt the metal within the crucibles24 and it will also be apparent that should the current of' electricitybe insullicient vto heat the metal 25 to the proper degrees, gas can beused to provide an additional supply of heat.

, From the above, it will be readily apparent that when it is desired toheat the metal before depositing the same within the mold orifice 27,the metal is deposited within the -cavities 25 of the crucibles and theswitch y 50 is operated to supply a current'ofv elec- Y tricity to theheating coils 38 through the bles not in use canbe cut oil' from thesupply wires 49 and 39 and through the medium of the plates 40, 42 and43 and it `will be apparent that should it be desired to use only oneormore of the crucibles, the cruciof electricity by operatingtheindividual switch members 41'.

After the metal within the crucibles has 50 can beoperated to cut oilthe heating current and the switch` 4 o erated to impart operate theshaft2 and rotateI the table- 11 with sufficienti speed whereby thecentrifu gal forcewill Vthrowfthemolten metal into the mold orifices v27while the metal is still in itsmolten state. If itis desired to allowthe coils 38. to remain .heated-during the jcentrifugal'inovement,thee-switches 41 and 50. will remain-,closed and as the brushes 48 beenheated to a molten condition, the switch l motion to the motor 1, wichin turnwill are'arranged in contact :with theplates 42 and 43, acontinuous supply of current will be supplied tothe coils 38 during therotation of thetable 11, so thatl it will assure lthe removal of `allparticles of -themolten metal from the-cavityf25,'during the rotationofthe table, as itis .desired to-,deposit within the cavities 25 vonlysuiicient-Ametal to cover-the outline 'of the moldwithinthc orifice 27.Therefore it is'necessary; that all of the metal within the cavities 25beremovedduring the'centrifugal movement of the late 11. Y

WElLile I have shown and described my im-V Y Iproved electrical dentalapparatus as particularly adapted for use in molding crowns,

plates and the like through said centrifugal movement, it is tobe'understoodthat myk im? proved device can beusedrequally 'aswellfor-'operating' dental lathes zandf'oth'er machinery applicable totheart and inlcarrying outthis feature of the invention, a sult` ableybracket `is'vsecured to the top; ofthe motor 1- andincludes`avlongitudinal barv member 57l which isf-bolted or yotherwise secured tothe top Vof the motorbymeans of the screw; bolts 58.1 Projectingradiallyfrom each endof the bar 57' and preferably at an angle, are thearms 59 having sleeves 60 v formed -at the outer endsv thereofl for' thepurpose of supporting a shaft 61.". The 'shaft l 61 is securely held in`'place Withinthe sleeve 1110 bearing 60 by means of the collars 62which ,are secured tothe shaft 61 adjacent the in-y ner ends of thesleeves 60.v The shaft 61 derives its power through the medium of -apulley 63 mounted upon the shaft and connected to the pulley 64 on theshaft 2 of the motor by means of the belt 65.. As clearly illustratedinI Figure 2, this .pulley 63 is loosely mounted upon the shaft 61 androtates independent of the shaft, but should it'be desired to impartmovement to the shaft 61,- the 'clutch member v 66 which isy keyed tothe shaft l61 will be 'engaged with the clutch member 67 carried by thepulley 63, whereby movement4 will be imparted to the shaft 61 when thesetwo clutch faces 66 and 67 are engaged with each other. t

adapte ranged withinthe sleeve is'a removable pin 69 adapted to have its`inner end engaged The iilley 63 is carried by a sleeve 68 Atoembracethe shaft 61 and ar- A within lanannular groove 70 formed inthe shaft r61, whereby to prevent lon itudinall movement of the` sleevey68upont :e: shaft 61 andto provide independent. rotary movement for the;pulleys-63 witherespect tothe shaftjl.l The clutch member 66. is; keyedto the shaft 61 andladapted to rotate-therewith and in order to operate.this clutchmember 66k to.V engagethe same with the.. clutch' 67 `asuitable lever; iszpivotally mounted. uponthe endof the' arm 72, whichin turn is integrally connected with one'of;

ythe sleeves 60.` The inner endA ofthe lever 71 is provided withL twolspaced arms 7 3- -arrangeduponopposite' sides yof the grooves 74:lVwithin the; clutch" member- 66 and. providedjwith-'guide pins 75attheir: outer ends adapted! to bey disposed; within this groove 7 4whereby, through: movement' oi the lever '71,.'1the1 clutch'. member*VA6,62 can bef-- moved longitudinally upon; theY shaft 61. and at. the;

same time rotate freely.I with. theshaft.

It willV be` understoodl thatv should it be desired tog operate-theshaft 61, the table -111 can be allowed ,to remain. stationaryl bydisenga-ging the projection 131 from the shaft 2v and engaging theclutchme'mben 66 with the clutch `member: 67'fwlierebyl the;A shaft 6lVcanv` be rotatedand` the-table 11 allowedv to remainfstationary; and'Iit? willfbe' understood] It is the main object` of" myjinvention-,lto vprovide an electrical',dentaly apparatuswhich `ing,y metals,but-wherein:-v several` articles can vbeyop'erated'`fromtlie'-samefsource of motive power,y such gasA a; dental lathe;l and variousequipments e particularly adapted? for useI in x tionof the table 1.1'by inserting-the flange: 77 in therguide-way ormedby the-il'ange76 thedental art.

In fFigureslO 4ytosll; 111 have :illustrated-the modifiedfformofmeansffor detachably. con- Anecting the molds to-the'crncible'- andrin this construction, a flangel 76L is providedv substantiallyl U-shapedinv formv andi spaced.

from theend of'fthe moldtoprovide-1aguide-` rway .for the.` annular.flange. 77 which is formed .on the-mold-QS: Thelanger member 76 isprovided atintervalsfwithI verforated ears-78, whereby the-flangecanye`A readily attached to the: endif of.vv the,l cruciblev` and` securelyheldin position. From-- this, it :will be noted' that thefmold` 281'can'bef readily secured to the crucibleffor receivingr the moltencontents: vof 'the -crucible upon rotaand.- as this, flange-77 is tob'eiittedxtightly within i thev guide-way, thev frictioni, between #the endofthe Crucible-and the end ofthe -mold l will* prevent-.fv the# moldfrommoving.; upward-ly withinzthe guide-way. 'during the.

rotation-of the table 11. However, any suitable form offasteni'ng meansmay b'e'used` if so desired, to securely hold the. mo1d`f in positionwith respect to the crucible-durmg the rotation of the-table:

In Fi msV re 11 I have illustrated a slightly modifie` Vform oa thecrucible` andthe manner of, heating' the same which includes a casingy79 havmg a removable endl piece 80 which maybe secured in position inany de:- sired manner yand rovidedj onits opposite end. with an opening;81 havin its'. edges oiset to provide the annular s oulder 82:

and av flange 83 arranged adjacent the shoulder, formin asubstantiallyannular seat'. The casing 9 isV filled with aisuitabl'e formy ofmaterial formed from a plastic, composition and illustrated` at 84 and'ar ranged within ythis material' is theheating element 85V whichin thepresentrinstance includes they wires 7 which are wound`around' a thinmatrix -of' material anda: conductive-v ofy heat;l They wiresv 85'` leadoutwardly through the 'detachable end portion 8O of the-v casingfto thesource vof'lsupplyI whereby heat maybe readilysupplied;l to the,y wiresl85 for heating the contentsfoff the crucible 86 which isv mounted withinthe chamber 87 formed in the body yof the material-84.

The chamber 87 which is'formed?inthe body 8 4isof substantiall thel samesize-as,

ythe opening81 in the en of the casing. 79 and the crucible 186 vis`arranged' within this chamber for lsupporting the metal to beheated inVposition Within the chamber, the outerI end of ysaid crucible bein-g'provided with anannularilange 88 which is adapted" to be arrangedwithin the; seatv formed by the shoulder 82 in thefiange 83.

The crucible 86 is retained in; positionl by. having thefla'sk 89abutting against the flange 88, said flask having an annular flan-gey90Y removably arranged i, with a channel'jmember 91 secured to thefront Wallofv the casing 79.v v

Arrangedwithin the ask 89 is the mold material 92 having the form 93formed therein, said form having a passage 94 which extends outwardlytoward the open end of the flask and is disposed: in direct alinementwith the opening-95 ormed'in the end of the Crucible 86. It will rbenoted` that at theend ofthe mold there is formed a lspace 96 `disposedbetween the end of the .such a` position thatthe heating element 85'will readily receive a supply of electricity l from the means operatingthe table so that the contents of the crucible 86 .can be readily heatedand conveyed into the mold form 93 upon rotation of the table.

upon rotation of the table 11 thrown by centrifugal force into asuitable mold attached to each of the crucibles and While I have shownand described this device as particularly adapted for use in connectionwith dental machines, it is apparent that the same can be used equallyas well by jewelers, plumbers or by anybody who desires to melt and castmetal in a mold through means of centrifugal force. l

\ What I claim is:

1. A dental machine comprising an electric motor having a verticallyextending shaft, a turn-table mounted thereon, a clutch ositionedbetween said shaft and turn-ta- Ele, a plurality ofmolds carried by saidturntable, and alternate means whereby gas or electricit m31 be used toheat said molds.

2. A ent machine comprising an elecf f In testimony whereof I ailix mysi tric motor having a vertically extending shaft, a turn-table mountedvthereon, a second shaft arranged at right angles to said motor shaft andmeans connected with said motor shaft for rotating said second shaft.

3. 'A dental machine comprising an elec-v tric motor having a verticallyextending shaft, a turn-table mounted thereon, a bracket carried by saidmotor, a shaft ro tatably mounted in said bracket and means connectingsaid motor shaft with said last mentioned shaft for rotating the same.

4. A dental machine comprising an electric motor 'having a verticallyextending shaft, a turn-table mounted thereon, a plurality of moldscarried by said turn-table, electrical means for heating the said moldsand alternate means for heating said molds,

5. A dental machine comprising anelectric motor having a verticallyextending shaft, a turn-table mounted thereon, a plurality of moldscarried by said turn-table, a plurality of heating means for heatin saidmolds, and means adapted to be coup ed `to the motor for drivingextraneous devices.

ature. NUMA ERVIN MOR AN.

